Let your mustache grow for at least 4–6 weeks without trimming
Eat a balanced diet with enough protein, iron, zinc, and vitamins
Stay hydrated
Sleep 7–9 hours each night
Exercise regularly to support healthy hormone levels
Reduce stress
Keep your face and mustache area clean
Exfoliate the skin under your mustache once or twice a week
Apply a light beard oil or moisturizer to keep hairs healthy
Brush or comb your mustache daily to train the hairs
Trim only stray hairs, not the bulk, while growing it out
Avoid overusing harsh shampoos or products
Do not smoke
Check for skin issues or hormonal problems if growth is very patchy
Be patient, since thickness is often determined by genetics